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<?php
// Action File
// Create Connection With Database
$conn = mysql_connect("localhost", "root", "") or die(mysql_error()."Error in server connection");
if($conn) {
  mysql_select_db("databaseName") or die(mysql_error()."Error in database conenction");
}

$firstName = $_POST['firstName'];
$lastName = $_POST['lastName'];
$email = $_POST['email'];
$password = $_POST['password'];
$query = mysql_query("insert in tableName(firstName, lastName, email, password)values('$firstName', '$lastName', $email, $password)") or die(mysql_error()."Error in query");
if($query) {
  echo 1;
} else {
  echo 0;
}
?>